What is the minimum interval for schedule triggers in GitHub Actions?

GitHub Actions enforces a minimum schedule interval of 5 minutes (cron expression: '/5 *'). Attempting to schedule more frequently than every 5 minutes will have the workflow throttled. Additionally, scheduled workflows on the default branch of public repositories may be disabled if the repository has no activity for 60 days. GitHub also doesn't guarantee exact timing — scheduled workflows can be delayed by several minutes or more during high system load. For near-real-time triggers, use webhook events or repository_dispatch instead.